Minor changes in blood lipids after 6 weeks of high-volume low-intensity physical activity with strict energy balance control

被引:7
作者
Branth, S
Sjödin, A
Forslund, A
Hambraeus, L
Holmbäck, U
机构
[1] Uppsala Univ, Dept Publ Hlth & Caring Sci, Uppsala, Sweden
[2] Uppsala Univ, Dept Womens & Childrens Hlth, Uppsala, Sweden
[3] Karolinska Inst, Novum, Dept Biosci, Unit Prevent Nutr, Huddinge, Sweden
关键词
exercise volume; energy turnover; cholesterol;
D O I
10.1007/s00421-005-0096-2
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Physical activity has been shown to favorably affect metabolic risk markers, including blood lipids. The impact of high-energy turnover, without influencing the traditionally used markers of exercise training effects, on blood lipids is still unclear. The aim was to study the effect of high-volume low-intensity physical activity on the blood lipid pattern, with a tight control of diet and energy balance. Eight untrained men [42.5 (12.1) years, body mass index 24.2 (2.8) kg m(-2) were tested in two different 6-week protocols. In the sedentary protocol, the subjects were instructed to limit their everyday physical activity. In the activity protocol, a 2-h physical activity bout was performed 5 days week(-1) (similar to 40% of VO2max; equivalent of an additional 21 MJ week(-1)supercript stop in energy expenditure). The diet for both protocols comprised similar to 40 energy percent (E%) fat, similar to 50 E% carbohydrates (CHO). The polyunsaturated fatty acids to saturated fatty acids ratio of the diet was similar to 0.12. There were no changes during each 6-week period or differences between the two protocols in body weight, body composition or aerobic capacity. Low-intensity physical activity did not affect lipid parameters substantially, except for a slightly lower Apo-B/Apo-A1 ratio with the activity protocol (P < 0.05). Total and low-density lipoprotein cholesterol, as well as Apo-B and Apo-A1, were increased during the beginning of each 6-week period (P < 0.05), but returned to basal levels by the sixth week. In conclusion, 6 weeks of high-volume low-intensity physical activity did not affect blood lipids substantially.
引用
收藏
页码:315 / 321
页数:7
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